Radiator for hot air furnaces



Feb., 11, 1941. E. H. SCOTT RADIATOR FOR HOT AIR FURNACES Filed Deir. 17, 1958 3 Sheets-Sheet 1 [1 /SHA H. 56077' llllllllllllllllllllll IHJDDDDDUIIHUIIDDDU Patented Feb. 11, 1941 Y l Y UNITED STATES PATENT oEFlcE RADIATOR FOR HOT AIR FURNACES Elisha H. Scott, Richmond, Ind., assgnor to The Johnson Sheet Metal Works Corp., Richmond, Ind., a corporation of Indiana Application December 17, 19,38, Serial No. 246,376

1 Claim. (CL 12.6 99) This invention relates to improvements in hot a somewhat; larger scale, as it appears from-the air furnaces and more particularly to a novel front of the furnace; radiator attachment therefor. Figure 5 is a yplan View of the radiator partly A11 object of this invention is to provide an in section and taken on the line 5-5 of Figure improved radiator attachment of novel con- 4, looking in the direction of the arrows; struction. y Figure 6 is a sectional view taken on the line Another object is to provide a furnace radiator 6`6 of Figure 5, looking in the direction of the attachment which can be readily installed in the arrows; fluid heating chamber of a furnace. The heat Figure 7 is a cross section View of the radiator radiator device may be connected in any furnace and attached bame plate taken on the line 'I--1 10 employed in fluid heating systems, for instance,V of Figure 6; air, or equivalent fluid heating systems. Figure 8 is a perspective view of the forward Another object `of this invention is tor prohalf `of the radiatorshowing the bafe member Vide a radiator attachment for furnaces which attached thereto. greatly enhances the heating efliciency of the Referring to the drawings in detail, the nul5 furnace by substantially increasing the heat metal 6 designates the outer casing 0f the furradiating surface. nace enclos-ing a furnace proper 1. The furnace `Another object isrto provide a radiator having comprises a reboX 8, grate 9, and ashpt 0r baliie means attached therein for causing the Fuel.- is introduced intothe furnace through the hot iiue gases to circulate in the radiator before doorfll and the member 'I2 permits entrance to 20 entering the stack. the aShDit. Y

Another object is to provide a novel and im- At the upper rear Section cf the furnace is an proved radiator which is inexpensive to manu- Opening 3 t0 Which iS connected 2t ShOIt ue .facture and one which can be readilyinstalled Sectcn I4, aS ShOWn in Figure 1- T0 this flue in conventional heating furnaces, section is connected the radiator l5. The radia- 25 A still further object 0f this invention is to torattachment I5 comprises a distorted rectanso connect the radiator in the ai'r or uid cham- 5111er Shaped hOlIOW member forming a chamber of the furnace that the incoming fluid will bei thlcllgh Which the gaSeOU-S Products 0f 00mbe admitted adjacent the radiator through which bustion pass before escaping to the atmosphere.

230 the hotgases of combustion are conducted to AC0119eltl'elly curved members l5 and I7 fOlm 30 the chimney, By this arrangement the advanthe forward and rearward walls of the radiator. tages obtained are three-fold. First, in connec, The Opposed hanged edges 0f these members are tion with hot air furnaces the incoming cold v Secured together aS' by thcyriVetS |8- It Will be e, s, airl will be heated more quickly. second,- the understood that the Wa11s1l 6 and l1 of the radial temperature of the gases passing into the stack i301" are curved l50 COnOIm t0 the adjacent Wall 35 will he greatly reduced, substantiauy increasing portions of the furnace and outer casing and the life of the fluid conduits and stack connecthat. in general, the radiator may be Shaped t0 tions. Finally, the overall heating efficiency of t the particular Space it S t0 Occupy in the the furnace is decidedly improved. furnace- 40 Still another object of this invention is to An opening I9 in the wall i6 and aperture 40 provide an improved radiatorconstruction and 20 of member I1 provide an entrance and exit design which is capab1e of withstanding high respectively for the flue gases. From the exit temperatures as well as rapid heating and cool- 20 the gases are conducted through a conduit 2| ing with resultant expansion and contraction to which communicates with the stack or chimney which it is subjected during use. 22. Near the bottom of the radiator is an open- 45 In the drawings: ing 23 adjoining the conduit 24. The latter ex- Figure 1 is a vertical section view taken tends out through the furnacecasing 6 and is through a hot air furnace embodying the irnprovided with a cover plate 25 which is removproved radiator of this invention; able, allowing access to the bottom of they radia- Figure 2 is a longitudinal section View taken tor for cleaning purposes. 50 on the line 2-2 of Figure 1,1ooking in the direc- Openings I9 and 20 are staggered so as to tion of the arrows; force the heated iiuid gases to circulate, to some Figure 3 is an elevation view of the radiator extent at least, through the radiator prior to enas viewed from the rear of the furnace; tering the stack 22. Cold air ducts 2B open into Figure 4 is a similar view of the radiator on the bottom of the, casing Q beneath the, outer 55 ends of the radiator I5, as illustrated in Figure 2.

The radiator preferably is made of sheet metal, the walls of which are corrugated to provide a maximum heat radiating surface. This construction also strengthens the radiator while affording greater resistance to distortion during expansion and contraction. It is understood, however, that if desired the radiator may be made by casting the same out of any suitable material.

A novel and inexpensive way of constructing the radiator is shown in Figure 5, wherein the radiator comprises two cupped sections generally designated 21 and 28. Section 21 comprises a curved corrugated wall member I6 having the ar#- cuate shaped portions 29 and the connecting. end walls 3l). The other section 28 is made of the curved corrugated wall member I1 and end wall portions 3l, as shown in Figure 5. Each of the sections 21 and 28 comprises a straight-edged complementary flange portion 32 and 33, respectively.

These flanges extend around each section. The two halves are riveted, bolted, welded or otherwise secured together to form the radiator. The corrugations 34 are preferably formed in the wall members I6 and I1 during manufacture of the radiator. To fluid seal the radiator parts 21 and 28, the flanges 32 and 33 are welded as at ,35. Other means may be employed to lform a fluidtight radiator.

suitably attached to the radiator member 21 is a baifle means 36 as illustrated in Figure 8A The baffle plate member forces the hot flue gases to circulate in the radiator before entering the stack, as indicated by the arrows on Figures 6 and '1.

The bafle member comprises a flat plate 31 which preferably is provided with longitudnal and transverse ribs 38. The ends 39 and4l of the plate 31 are curved to fit snugly against the walls I6 and I1 respectively, and the plate is secured to the opposed walls of the radiator at the flanged portions 4I and 42 by the bolts 43.

Adjacent the under side of the plate 3 1 are positioned the skirt members 44. Preferably these members are cut-away diagonally with respect to the sides ofthe plate 31 as at 45 and do not extend the full length ofthe plate as shown in Figure 8. The skirt members 44 arev not attached to the under side of the plate 31 but are welded or otherwise secured as at 46 to the wall I6. 'y

This construction Ais optional, however, and if desired the skirt members may be attached to the sides of the plate 31 or otherwise positioned so as to force the flue gases to circulate downward, outward and upward centrally in the radiator prior to entering the stack. To accomplish this the skirt members 44 will preferably be positioned to form an obtuse angle with respect to the under surface of plate 31, so asV to force the hot gases to flow outward against the side wallsof the radiator. This greatly increases the eiciency of the radiator.

The sections 21 and 28 of the radiator may be suitably formed by die-pressing or cold-draw- "ing of metal sheets, and the corrugations and apertures may be formed at the same time. Thereafter the sections are fastened together and sealed fluid-tight. Prior to riveting or fastening the members 21 and 28 permanently together the baffle plate 31 will be secured to the wall I1 of the part 28. Optionally, however, the plate 31 may merely rest against the wall I1 without being bolted thereto.

The improved construction of the radiator, whereby the different sections can be united along a straight edge, provides an efficient andv improved way of making a radiator of this character. Further, by reason of the straight-edge opposed Vflanges the radiator parts can be more readily assembled. Use of the ordinary riveting machines is aorded, which lowers the cost of manufacture.

It willbe understood, of course, that this invention is not limited to the exact details of construction and use of the radiator device, since obvious modifications and adaptations may be made by those skilled in the art, without departing from the spirit of this invention.

Having thus fully described my invention,

vex surface, and the Vertical wall of said other member having an outer concave surface, each of said members having topand bottom wall portions, said flanges when attached together eX- tending closely Vadjacent to the medial top and bottom margins of said concave surface wall, and

extending comparatively remote from the medial` top and bottom margins of the opposite vertical Wall.

ELISHA H. SCOTT. 

